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Measuring Usability Homepage
Quantitative Usability, Statistics & Six Sigma by Jeff Sauro

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Tag: Geometric Standard Deviation

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Graph and Calculator for Confidence Intervals for Task Times ( 89 )
Visualizing your task time data is an essential step in understanding its distribution and computing accurate confidence intervals. This calculator creates a dot-plot of your task times, transforms the raw data to adjust for non-normality and computes the intervals.

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